Chock-block.



F. T. ROBERTSKL F. W. RAPSON.

CHOCK BLOCK.

APPLICATION FILED APR.I.19I5.

Patented Nov. 9, 1915.-

Qwuwwbow FRANKLIN T. ROBERTS AND FREDERICK W. RAPSON, OF BAD AXE, MICHIGAN, ASSIGNORS TO WILLIAM RAPSON & SONS, OF BAD AXE, MICHIGAN.

GI-IOCK-BIJOCK.

To all whom it may concern Be it known that we, FRANKLIN T. Roc- ERTS and FREDERICK N. .Rarson, citizens of the United States, residing at Bad Axe, in the county of Huron and State of Michigan, have invented certain new and useful Improvements in Chock-Blocks; and we do declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled'in the art to which With the above and other objects in view,

the invention consists of certain novel features of construction, combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawing: Figure 1 represents a side elevation of a truck equipped with this improved chock block which is mounted in operative relation thereto in full lines and shown inoperatve in clotted lines; Fig. 2 is a detail vertical section thereof; Fig. 3 is a horizontal section taken on the line 3-3 of Fig. 2; Fig. 4: is a vertical transverse section thereof.

In the embodiment illustrated, a track section 1 is shown with a truck 2 mounted thereon to which this improved brake or chock is shown applied.

The chock block constituting this invention comprises a block 3 of any suitable material, here shown substantially rectangular in form and with its wheel engaging face which is disposed at the front of the block, inclined upwardly and inwardly to adapt it to engage the periphery of the wheel adjacent the track section 1 as shown in Fig. 1, said wheel engaging face being provided at its opposite side edges with forwardly projecting flanges 4L which are adapted to fit on opposite sides of the wheel to hold the block engaged therewith against lateral movement. This block 3 is provided at both ends Specification of Letters Patent.

PatentedNov. 9,1915.

Application filed April 1, 1915. Serial'No. 18,501.

on opposite sides with depending lugs or ears?) which are adapted to engage opposite sides of the rail 1 to assist in holding the block against lateral movement. EX- tending transversely across the rail engaglng face 6 of the block are a plurality of rail gripping elements 7, two being here shown. These rail gripping elements 7 are angular in cross section, being here shown rectangular and are positioned so that the sharp edges thereof are arranged to engage and biteinto the face or tread portion of the rail when the device is applied, thereby holding the block 3 reliably in engagement with said rail against longitudinal movement relatively thereto. These gripping elements 7 are reversible to adapt them to present different biting edges to the rail to compensate for wear so that when one of said edges becomes rounded or smooth, the elements may be slipped longitudinally out of its seat in said block and reversed to position another biting face for contact with the rail. These elements 7 are made of tempered steel to effect a reliable biting engagement with the rail while the block itself may be composed of any other cheaper material. Four corners are here shown provided on each of the gripping elements 7 and when all of these become so worn as to be inoperative, the elements may be discarded and new ones substituted. This block 3 is connected with the truck 2 by a curved plate spring 8 here shown composed of two sections 9 and 10, the meeting ends of which are adjustably connected by bolts 11. The inner end of the section 9 is secured to thetruck in any suitable manner, being here shown bolted thereto, while the section 10 is curved and its free end is secured to the block 3 on the upper face thereof by suitable fastening elements, two bolts 12 being here shown for this purpose. In the operation of this device, when it is desired to brake or chock the vehicle carrying this block 3, all that is necessary is to lower the block into engagement with the rail 1 and force it forwardly to cause the wheel engaging face thereof to be positioned in engagement with the periphery of the wheel near its contact with the rail, and the pressure of said wheel on said face will force the biting elements 7 into the rail 1 and thus securely lock the block to the rail and prevent'retrograde movement of the vehicle.

When it is desired to remove the chock from engagement with the wheels of the shorten-the spring 8 and the bolts ll tightened again, itbeing understood that they vehicle and to hold it suspended in inoperative position,-it is withdrawn from the block and the member 10 of the supporting spring 8 is slipped rearwardly on the member 9 to V inwardly inclined wheel engaging face with flanges at its opposite sides, depending members at the opposite sides of said block to engage opposite sides of a rail, gripping-ele' ments extending transverselyzof the rail engaging face of said block, said elements beingangula1' in cross section and reversible to present different rail biting edges to compensate for wear, and means connecting said block to said vehicle.

'2. A chock block comprising a substantially rectangular member having an upwardly and rearwardly inclined wheel engaging face with upwardly extending flanges at the opposite side edges thereof,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,-

depending lugs carried by the lower edges of said block for engaging opposite sides of a rail, and rail biting elements exten'ding transversely of said block and made angular in cross section, said rail biting elements being reversible to compensate for wear.

A chock block comprising a c substanc. 'tlally rectangular member having an upwardly and rearwardly inclined wheel engaging face with upwardly extending flanges at the oppositeside'edgeslthereof, depending lugs carried by the loweredges of said block for engaging opposite'sides of a rail, rail biting elements extending trans' verselyof said block and made angular in cross section, said rail biting elementsbeing reversible'to compensate for wear, a supporting spring connected at. one'end of said N block and curved upwardly and forwardly,

and means for adjusting saidspring to vary the position of the block relatively to the wheel to which it is to be applied.

' In testimony whereof we have-hereunto set our-hands in: presence of two subscribing l/Vitnesses-z E. M. COLE, C. D. THOMPSON,

Washington, D. 0. 

